Show 40 profiles per directory page instead of 30 (#9609)

To better align with the list of hashtags

app/controllers/directories_controller.rb

@@ -32,7 +32,7 @@ class DirectoriesController < ApplicationController
   end
 
   def set_accounts
-    @accounts = Account.discoverable.page(params[:page]).per(30).tap do |query|
+    @accounts = Account.discoverable.page(params[:page]).per(40).tap do |query|
       query.merge!(Account.tagged_with(@tag.id)) if @tag
     end
   end